Water heater



Feb. 9, 1937. l E. J. HANSEN WATER HEATER 5 Sheets-Sheet 1 Filed March4, 1932 E. J. HANSEN WATER HEATER I Feb. 9, 1937.

Filed March 4, 1932 3 sheetssheet 2 H 29 INVENTOR 2/5 ATTORN Y Feb. 9,1937. E. J. HANSEN 2,070,535

WATER HEATER Filed March 4, 1932 5 Sheets-Sheet 5 71/5 ATTO EY PatentedFeb. 9, 1937 ATENT" OFFlCE r WATER HEATER corporation of OhioApplication March 4, 1932, Serial No. 596,847

3 Claims.

This invention relates to water heaters, and in particular storageautomatic water heaters of the type in which the heat of a gasburner isapplied directly to the storage vessel or water container.

It is the object of this invention to provide in a heater of the typedisclosed, an improved combustion chamber housing which is arranged tofacilitate the assembly of the heater as well as certain otherimprovements relating to the means for mounting the burner and thearrangement and construction oi. the door provided for permitting accessto the stated combustion chamher.

With these and other objects, in view, the invention consists in thenovel construction, arrangement and combination of parts, hereinafterdescribed, illustrated in some of its embodiments in the accompanyingdrawings and particularly pointed out in the appended claims.

In the drawings, Figure l is a side elevational view partly in sectionof my improved water heater.

Figure 2 is a sectional view taken on line 2-2, Figure 1.

Figure 3 is an enlarged side elevational view showing the combustionchamber housing and the door means provided for permitting access to theinterior of the combustion chamber.

Figure 4 is a sectional view taken on line 4-4, Figure 3.

Figure 5 is a side elevational view showing the inner side of the doorassembly with the door in its closed position and Figure 6 is a sideelevational view taken on line 6-43, Figure 5 illustrating the means bywhich the combustion chamber door may be held in its open position.

The heater illustrated by Figure 1 comprises a storage tank I, which isarranged to be connected to a cold water supply conduit 2 and a hotwater outlet pipe 3. The storage container l is surrounded by a casing4, which is spaced a short distance from the walls of the tank I, so asto provide a passageway thereabout for the heated products of combustionfrom the source of heat provided for the appliance.

The inner casing 4 is surrounded in turn, by an outer casing 5. Thespace between the casings 4 and 5 may be filled with a heat insulatingmaterial if desired, as is customary in such heaters. A gas burner 6 ispositioned below the bottom of the tank I for the purpose of heating thewater in the tank. The heated products of combustion produced by theburner 6, flow upwardly through the space between the inner casing l andthe tank I, and are vented from the appliance by way of a flue I, whichis connected to the top of the heater.

The cold water supply line to the tank I, includes a dip pipe 8,terminating adjacent the tank bottom, whereby the incoming water isdirected against the bottom of the tank and does not become mixed withthe hot water in the upper part of the tank.

A gas supply-conduit 9 conducts gas from a source of gas supply to theburner 6. A continuously operating pilot burner III, formed integrallywith the main burner 6 is provided for igniting this burner. The pilotburner III is supplied with gas by way of a conduit II, under control ofthe manually operable valve I2. able shut-off valve I3 is provided iormanually controlling the operation of the main burner 6.

A tank temperature responsive thermostatic valve I4 cooperates with apilot governed thermostatic valvel5, to automatically regulate thesupply 01 fuel to the burner 6 in accordance with the temperature of thewater in the tank I, and under control of the pilot burner III. Thethermostatic valve I4 is secured in a tapped opening I6 provided in thewall of the tank I, and the valve I5 is secured in position in a mannerto be described in detail presently.

The housing defining the combustion chamber for the burner 6, is formedfrom three castings which include a front casting I6 and two rearcastings in its construction. The front housing casting l6 has anopening formed by four outwardly extending flanges I8, to which issecured a door assembly. This assembly comprises an apertured plate orframe I9, to which is secured a spring hinged door 20 and a plate 2|.

The frame I9 and the plate 2| have matched cut-out portions to providesuitable openings 34, 35 and 36 for receiving the parts associated withthe thermally actuated valve I5, the pilot supply conduit II and theburner 6, whichextend into the interior of the heater combustionchamber. The door 20 is hinged to a rod 22, carried by the frame I9, andis provided with a closure spring 23 for maintaining it in its closedposition.

A weighted bell crank 24 is pivotally mounted on a pin 25, carried bythe door 20. The weighted end 28 of the crank is arranged to cause thecrank to assume the position shown in Figure 6 when the door is opened.In this position the unweighted end of the crank is in engagement with Amanually operthe frame IQ for maintaining the door in open position.

Closure of the door may be efiected by either raising the weightedportion 26 of the crank, or by opening the door still further andletting it snap shut under influence of the spring 23, whereupon thebell crank is jolted to the position shown in Figure 5 as the doorcloses. This effect is made possible by forming the unweighted end ofthe bell crank with a cam face 31 and by having the weight 26 justbalance the crank when it is in the position shown in Figure 6. The sameeffect could be achieved by forming the bell crank 2d so that when in astate of stable equilibrium or in balance, its upper arm would form anacute angle with the horizontal.

The casting I6 is provided with slotted'ears 27, which cooperate withcars 28 and 29, formed on the opposite ends of the sections ii, to holdthe housing elements in position. The slots of the matched earscooperate to provide bolt holes 359 for the bolts 38. By the use ofslots instead of circular holes an adjustable feature is providedwhereby the housing may be readily assembled even though there areslight variations in the elements i6, i1 and IT as always occurs incastings of this size. The bolts 38 serve the triple purpose of securingthe casing elements to each other, securing the casing elements to thebase 39, and securing the legs 3! to the base 39.

"he housing elements It and H are each formed with an inwardlyprojecting lug 32 and d2 respectively, adjacent the top thereof forsupporting the inner casing i. Intermediate the top and bottom of eachof the elements l6 and ii, there is provided an inwardly projecting lug33 and ll] for the respective sections of the combustion box. The lugs33 and lil are arranged to engage the bottom of the tank I! and supportit in proper position. The upper ends of the housing sections aresecured to each other by means of the bolts tl. The casing d is securedto the housing sections by bolts 33, one of which is provided for eachsection of the housing.

The door frame i9 is removably secured to the front casing element it bymeans of four bolts M. The plate 25 is removably secured to the frame19, by means of two bolts t5. The Bunsen tube 36 of the burner 6 has alug M formed on it at a point adjacent its inlet end. This lug isdrilled to receive two screws 38 which are threadably received in a pairof tapped holes 5Q provided in the ledge is of the door frame.

By reason of this arrangement just described,

- bustion chamber may be readily removed through the door opening.

Furthermore, it is to be understood that the particular forms ofapparatus shown and described, and the particular procedure set forth,

- are presented for purposes of explanation and illustration and thatvarious modifications of saidapparatus and procedure can be made withoutdeparting from my invention as defined in the appended claims.

Having thus described my invention, what I claim is:

1. In a device for producing heat changes in a desired medium, ahousing, an opening through a wall thereof, an open frame fitted withinsaid opening, a burner assembly and a control valve extending throughsaid opening, a plate mounted across the opening or said frame bypartially closing same, the frame and the plate having correspondingnotches for the reception of the burner and the valve, and a dooracrossv the remaining portion of the frame opening.

2. In a device for producing heat changes in a desired medium, a housinghaving an opening through a wall thereof, an open frame fitted Withinsaid opening, a heat exchange producing unit mounted on and supported bysaid frame, and closure means over said frame opening, said closuremeans including a door, and a fixed plate, said plate and said framehaving corresponding notches for the reception of connections for theunit, the unit being removable through the frame opening after the plateis removed and the door opened.

3. An assembly of the kind described, in c0mbination, a walled enclosurehaving an opening therein, an open frame in said opening, a heatexchange assembly removably mounted on said frame, and having partsthereof extending through the frame opening, a plate secured to saidframe, said frame and said plate defining openings through which saidparts may extend and likewise defining a door opening, and a dooradapted to close said door opening.

EARL J. HANSEN.

